This patch set introduces the support to configure default Rx queue during runtime.
A new sysfs attribute "default_rx_queue" has been added, allowing users to check
and modify the default Rx queue.
This patch set is tested on two back-to-back connected i226 on Intel ADL-S systems.
Test Steps and expected results:
1. Check default_rx_queue index:
@DUT: $ cat /sys/devices/pci0000:00/0000:00:1c.0/0000:02:00.0/default_rx_queue
0
2. Check statistic of Rx packets:
@DUT: $ ethtool -S enp2s0 | grep rx.*packets
rx_packets: 0
rx_queue_0_packets: 0
rx_queue_1_packets: 0
rx_queue_2_packets: 0
rx_queue_3_packets: 0
3. Send 10 ARP packets:
@LinkPartner: $ arping -c 10 -I enp170s0 169.254.1.10
ARPING 169.254.1.10 from 169.254.1.2 enp170s0
Unicast reply from 169.254.1.10 [00:A0:C9:00:00:00] 0.725ms
Unicast reply from 169.254.1.10 [00:A0:C9:00:00:00] 0.649ms
Unicast reply from 169.254.1.10 [00:A0:C9:00:00:00] 0.577ms
Unicast reply from 169.254.1.10 [00:A0:C9:00:00:00] 0.611ms
Unicast reply from 169.254.1.10 [00:A0:C9:00:00:00] 0.706ms
Unicast reply from 169.254.1.10 [00:A0:C9:00:00:00] 0.644ms
Unicast reply from 169.254.1.10 [00:A0:C9:00:00:00] 0.648ms
Unicast reply from 169.254.1.10 [00:A0:C9:00:00:00] 0.601ms
Unicast reply from 169.254.1.10 [00:A0:C9:00:00:00] 0.628ms
Unicast reply from 169.254.1.10 [00:A0:C9:00:00:00] 0.641ms
Sent 10 probes (1 broadcast(s))
Received 10 response(s)
4. Check statistic of Rx packets to make sure packets is received by default queue (RxQ0):
@DUT: $ ethtool -S enp2s0 | grep rx.*packets
rx_packets: 10
rx_queue_0_packets: 10
rx_queue_1_packets: 0
rx_queue_2_packets: 0
rx_queue_3_packets: 0
5. Change default_rx_queue index to Queue 3:
@DUT: $ echo 3 | sudo tee /sys/devices/pci0000:00/0000:00:1c.0/0000:02:00.0/default_rx_queue
3
@DUT: $ cat /sys/devices/pci0000:00/0000:00:1c.0/0000:02:00.0/default_rx_queue
3
6. Send 10 ARP packets:
@LinkPartner: $ arping -c 10 -I enp170s0 169.254.1.10
ARPING 169.254.1.10 from 169.254.1.2 enp170s0
Unicast reply from 169.254.1.10 [00:A0:C9:00:00:00] 0.653ms
Unicast reply from 169.254.1.10 [00:A0:C9:00:00:00] 0.652ms
Unicast reply from 169.254.1.10 [00:A0:C9:00:00:00] 0.653ms
Unicast reply from 169.254.1.10 [00:A0:C9:00:00:00] 0.649ms
Unicast reply from 169.254.1.10 [00:A0:C9:00:00:00] 0.600ms
Unicast reply from 169.254.1.10 [00:A0:C9:00:00:00] 0.698ms
Unicast reply from 169.254.1.10 [00:A0:C9:00:00:00] 0.694ms
Unicast reply from 169.254.1.10 [00:A0:C9:00:00:00] 0.678ms
Unicast reply from 169.254.1.10 [00:A0:C9:00:00:00] 0.609ms
Unicast reply from 169.254.1.10 [00:A0:C9:00:00:00] 0.634ms
Sent 10 probes (1 broadcast(s))
Received 10 response(s)
7. Check statistic of Rx packets to make sure packets is received by new default queue (RxQ3):
@DUT: $ ethtool -S enp2s0 | grep rx.*packets
rx_packets: 20
rx_queue_0_packets: 10
rx_queue_1_packets: 0
rx_queue_2_packets: 0
rx_queue_3_packets: 10
Blanco Alcaine Hector (3):
igc: Add documentation
igc: Add default Rx queue configuration via sysfs
igc: Add default Rx Queue into documentation
.../device_drivers/ethernet/index.rst | 1 +
.../device_drivers/ethernet/intel/igc.rst | 103 ++++++++++++
drivers/net/ethernet/intel/igc/Makefile | 3 +-
drivers/net/ethernet/intel/igc/igc_main.c | 6 +
drivers/net/ethernet/intel/igc/igc_regs.h | 6 +
drivers/net/ethernet/intel/igc/igc_sysfs.c | 156 ++++++++++++++++++
drivers/net/ethernet/intel/igc/igc_sysfs.h | 10 ++
7 files changed, 284 insertions(+), 1 deletion(-)
create mode 100644 Documentation/networking/device_drivers/ethernet/intel/igc.rst
create mode 100644 drivers/net/ethernet/intel/igc/igc_sysfs.c
create mode 100644 drivers/net/ethernet/intel/igc/igc_sysfs.h
--
2.34.1
